<template>
  <view class="uni-countdown">
    <view v-if="showDay" class="uni-countdown__number" :style="{ borderColor: borderColor, color: color, background: backgroundColor }">{{ d }}</view>
    <view v-if="showDay" class="uni-countdown__splitor" :style="{ color: splitorColor }">天</view>
    <view class="uni-countdown__number" :style="{ borderColor: borderColor, color: color, background: backgroundColor }">{{ i }}</view>
    <view class="uni-countdown__splitor" :style="{ color: splitorColor }">{{ showColon ? ':' : '分' }}</view>
    <view class="uni-countdown__number" :style="{ borderColor: borderColor, color: color, background: backgroundColor }">{{ s }}</view>
    <view v-if="!showColon" class="uni-countdown__splitor" :style="{ color: splitorColor }">秒</view>
  </view>
</template>
<script>
export default {
  name: 'uni-countdown',
  props: {
    showDay: {
      type: Boolean,
      default: true
    },
    showColon: {
      type: Boolean,
      default: true
    },
    backgroundColor: {
      type: String,
      default: '#FFFFFF'
    },
    borderColor: {
      type: String,
      default: '#000000'
    },
    color: {
      type: String,
      value: '#000000'
    },
    splitorColor: {
      type: String,
      default: '#000000'
    },
    day: {
      type: Number,
      default: 0
    },
    hour: {
      type: Number,
      default: 0
    },
    minute: {
      type: Number,
      default: 0
    },
    second: {
      type: Number,
      default: 0
    }
  },
  data() {
    return {
      timer: null,
      d: '00',
      h: '00',
      i: '00',
      s: '00',
      leftTime: 0,
      seconds: 0
    };
  },
  created: function(e) {
    this.seconds = this.toSeconds(this.day, this.hour, this.minute, this.second);
    this.countDown();
    this.timer = setInterval(() => {
      this.seconds--;
      if (this.seconds < 0) {
        this.timeUp();
        return;
      }
      this.countDown();
    }, 1000);
  },
  beforeDestroy() {
    clearInterval(this.timer);
  },
  methods: {
    toSeconds(day, hours, minutes, seconds) {
      return day * 60 * 60 * 24 + hours * 60 * 60 + minutes * 60 + seconds;
    },
    timeUp() {
      clearInterval(this.timer);
      this.$emit('timeup');
    },
    countDown() {
      let seconds = this.seconds;
      let [day, hour, minute, second] = [0, 0, 0, 0];
      if (seconds > 0) {
        day = Math.floor(seconds / (60 * 60 * 24));
        hour = Math.floor(seconds / (60 * 60)) - day * 24;
        minute = Math.floor(seconds / 60) - day * 24 * 60 - hour * 60;
        second = Math.floor(seconds) - day * 24 * 60 * 60 - hour * 60 * 60 - minute * 60;
      } else {
        this.timeUp();
      }
      if (day < 10) {
        day = '0' + day;
      }
      if (hour < 10) {
        hour = '0' + hour;
      }
      if (minute < 10) {
        minute = '0' + minute;
      }
      if (second < 10) {
        second = '0' + second;
      }
      this.d = day;
      this.h = hour;
      this.i = minute;
      this.s = second;
    }
  }
};
</script>
<style lang="scss">

.uni-countdown {
  display: inline-flex;
  flex-wrap: nowrap;
  justify-content: center;

  &__splitor {
    line-height: 45upx;
    font-size: 24upx
  }

  &__number {
    line-height: 45upx;
    justify-content: center;
    height: 45upx;
    margin: 0 5upx;
    font-size: 24upx;
  }
}
</style>
